Search DataGridView

 public static class Extensions
    {
        public static DataGridView SearchDataGrid(this DataGridView Grid, string Text = "")
        {
            foreach (DataGridViewRow linha in Grid.Rows)
            {
                foreach (DataGridViewCell celula in linha.Cells)
                {
                    if (string.IsNullOrWhiteSpace(Text) || celula.Value.ToString().Contains(Text))
                    {
                        linha.Visible = true;
                        break;
                    }
                    linha.Visible = false;
                }
            }
            return Grid;
        }
    }